I assume that the 'error' that you're talking about is the fact that your model is being clipped on the screen, correct?
Question, how large is this model in tems of physical size? How long is it in meters?
For now go to 'Edit Camera' (if you can't find it, use the Command Finder) and near the bottom of the dialog you'll find a big button labeled 'Fit Planes to Extents'. Select it and then hit OK. DId that help?